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EP0420959A4 - Method of repairing a pipeline and apparatus for use in such a method - Google Patents

Method of repairing a pipeline and apparatus for use in such a method

Info

Publication number
EP0420959A4
EP0420959A4 EP19900906072 EP90906072A EP0420959A4 EP 0420959 A4 EP0420959 A4 EP 0420959A4 EP 19900906072 EP19900906072 EP 19900906072 EP 90906072 A EP90906072 A EP 90906072A EP 0420959 A4 EP0420959 A4 EP 0420959A4
Authority
EP
European Patent Office
Prior art keywords
core member
annular
radially expandable
expandable device
surface portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19900906072
Other versions
EP0420959B1 (en
EP0420959A1 (en
Inventor
David Richard Harrington
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Barry Brothers Specialised Services Pty Ltd
Original Assignee
Barry Brothers Specialised Services Pty Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Barry Brothers Specialised Services Pty Ltd filed Critical Barry Brothers Specialised Services Pty Ltd
Priority to AT90906072T priority Critical patent/ATE94966T1/en
Publication of EP0420959A1 publication Critical patent/EP0420959A1/en
Publication of EP0420959A4 publication Critical patent/EP0420959A4/en
Application granted granted Critical
Publication of EP0420959B1 publication Critical patent/EP0420959B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/18—Appliances for use in repairing pipes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
    • F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
    • F16L55/1645—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a sealing material being introduced inside the pipe by means of a tool moving in the pipe
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
    • F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
    • F16L55/163—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a ring, a band or a sleeve being pressed against the inner surface of the pipe
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/26—Pigs or moles, i.e. devices movable in a pipe or conduit with or without self-contained propulsion means

Definitions

  • This invention relates to the process of refurbishing damaged conduits, pipelines and sewer pipes ⁇ through the application of a reinforced lining to their inner walls by means of an inflatable form.
  • thermosetting resin-impregnated reinforcement material to the inner walls of a section to be relined by means of a form inflatable by air or water pressure.
  • curing of the thermosetting resin may be accelerated by circulation of hot water, air or steam through said
  • the present invention aims at providing an apparatus for the refurbishment of pipelines and sewer pipes through the application of a layer of thermosetting resin-impregnated reinforcement material to their inner walls by means of an inflatable form which may be readily and reliably stripped from a refurbished section and which embodies a coaxial duct capable of sustaining a flow of water or sullage through the form whilst it is in use.
  • the invention also may be rendered flexible or more or less rigid as circumstances dictate.
  • the radially expandable device comprises an inflatable element defining an annular or part annular encl.osed space extending axially along said core member.
  • the inflatable element comprises inner and outer flexible sheets connected to said core member at adjacent axial positions with the annular or part annular enclosed space being located between said inner and outer flexible sheets.
  • a flexible shroud member is arranged over and outwardly of said inflatable element, said flexible shroud member forming said outer surface portion.
  • the annular space is divided to form a fluid flow passage circulating at least in part along the outer surface of the tube.
  • the annular enclosed space is divided by an annular or part annular wall member secured at one end to the form member at a position between opposed ends of the flexible tube.
  • Inflating medium inlet and outlet means may be provided on either side of the dividing annular or part annular wall means.
  • the core member is annular in construction enabling the maintenance of fluid flow through the pipeline during the repair process.
  • apparatus for use in the repair of pipelines by the application of reinforcement material impregnated with a settable resin to an inner wall of the pipeline, said apparatus including a core member and an inflatable member secured to an outer surface of the core member, said core member being formed by a plurality of annular sections, each said annular section having end formations adapted to engage with end formations of an adjacent said section when axially pressed together to maintain a rigid annular shape for said core member, and means to selectably press said end formations into engagement or release said end formations from engagement.
  • the core member can be flexed to allow passage through curved pipe lengths.
  • a method of repairing pipelines comprising providing a core member with a radially expandable device located outwardly of said core member, said radially expandable device extending axially along said core member and at least partly circumferentially around said core member, said radially expandable device having an outer surface portion connected to said core member only at or adjacent one axial end of said outer surface portion of the radially expandable device, locating a repair material over said outer surface portion of the radially expandable device, positioning the c core member together with said repair material into the conduit to be repaired so that said repair material overlies a zone of said conduit to be repaired, expanding said radially expandable device so as to press the repair material including a settable substance against the zone of , Q the conduit to be repaired, holding the expanded condition of said radially expandable device for a length of time sufficient for said repair material to remain adhered to said conduit to be repaired, and contracting said radially expandable device and withdrawing said
  • Figure 1 is a longitudinal cross sectional view of one side of an inflatable form.
  • FIG. 2 is a longitudinal cross sectional view of part of the coaxial duct of a form.
  • an inflatable form 1 is made by partially everting a tube of a suitably elastic material and fastening its two ends 2 and 3 adjacent each other to a core member in the form of a coaxial duct 4, end 3 being positioned adjacent one end of said coaxial duct.
  • c Fixed to said coaxial duct between said ends is one end 5 of a tubular director sleeve 6 which extends axially substantially throughout the length of said inflatable form and its other end being open.
  • Said director sleeve may be made of impervious material or may be made wholly or partly foraminous.
  • Inlet and outlet means 8,11 are provided on either side of the sleeve 6 to enable an inflating medium to be delivered and withdrawn from the form 1.
  • Fastened c coaxially to end 3 of said tube or to a point on said coaxial duct beyond the position of end 3 if the end of said coaxial duct is extended is one end of a flexible outer shroud 7, the other end of which is free against the other end of said coaxial duct.
  • the outer shroud 7 might be omitted from the embodiment illustrated and in which case the outer flexible wall 20 of the tube 1 forms the outer surface portion of the inflatable element. It is also possible when using an outer shroud 7, a simple inflatable element might be used with its axial
  • Temperature distribution may be adjusted as required by the 5 provision of a said tubular director sleeve provided with foramina of a number size and positioning to allow a suitable short-circuiting of the heated flow.
  • the inflating medium might be water, air or some other suitable gas or fluid.
  • coaxial duct 4 of an ⁇ inflatable form comprises a plurality of tubular elements 12 in a collinear arrangement.
  • Each of said tubular elements is provided on one end face with a shaped, circumferential, axially extending ridge 16 and, at the other end, a complementary_recess 17.
  • tubular elements are abutted, said ridges and recesses register to locate said tubular elements in collinearity.
  • Provided through the length of each of said tubular elements is one or more cable ports 13 through which a tensioning cable 14 passes from one end of said coaxial duct to the
  • Said tensioning cable is fixed to the terminal member at one end of said coaxial duct and is provided at the other end with screw or other suitable means by which said tensioning cable may be tensioned.
  • said tubular elements are
  • outer jacket 15 of some suitably flexible material which is , c fastened and conveniently sealed at each end to a respective element 12.
  • the jacket 12 serves to seal said tubular elements together. It will of course be appreciated that the jacket 15 is necessary when a simple inflatable member is used so that the inflating medium does not escape inwardly of the elements 12. With the inflatable element as shown in Figure 1, the jacket 15 might be omitted.
  • said tensioning cable or cables are loosened allowing individual members of said tubular elements to move relative to one another, thus rendering both said coaxial duct and said inflatable form flexible.
  • said tensioning cable or cables are tensioned, rendering said coaxial duct and said inflatable form rigid in the manner aforesaid.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Pipe Accessories (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Removal Of Insulation Or Armoring From Wires Or Cables (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Pipeline Systems (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)

Abstract

A method of repairing a pipeline and apparatus for use in such a method is disclosed where a sheet like repair material is set in position within the pipeline with the use of a settable substance, the repair material being carried into the pipeline on a core member (4) the carries an inflatable member, the inflatable member (1) extending axially along the core member (4) and at least partially around the core member (4) to define an annular or part annular enclosed space (9,10) extending along the core member (4), means (8,11) being provided to inflate or deflate the inflatable member when in position in the pipeline, the inflatable member further having an outer flexible surface portion fixed only at one axial end to the core member, the inflatable member (1) acting when inflated to press the repair material against the pipeline wall to be repaired with the inflatable member (1) being thereafter deflated with the apparatus being withdrawn from the pipeline in a direction whereby the outer wall portion of the inflatable member (1) is progressively everted and peeled away from the repair material.

Description

A ME1H0D OF REPAIRING A PπΕ INE AND APPARATUS FDR USE IN SUCH A METHOD
This invention relates to the process of refurbishing damaged conduits, pipelines and sewer pipes ς through the application of a reinforced lining to their inner walls by means of an inflatable form.
The refurbishment of cracked, broken or eroded pipelines or sewer pipes through so-called soft lining methods involving the application of a reinforced lining to
10 their inner walls is well known in the art. Two principal methods are employed: the inversion of a tube of thermosetting resin-impregnated reinforcement fabric into a section to be relined from an external position by means of a head of water, and the application of a layer of
15 thermosetting resin-impregnated reinforcement material to the inner walls of a section to be relined by means of a form inflatable by air or water pressure. In both cases, curing of the thermosetting resin may be accelerated by circulation of hot water, air or steam through said
2Q inflatable form.
A shortcoming exists in the second method described in which an inflatable form is employed in that, particularly with repeated use, the external material of the form may develop an affinity for the resins employed in the
2ς relining process and may thus bond to the new lining. This renders difficult the stripping and removal of the form after curing of the resin. Additionally, the arrangement of some inflatable forms is such that an even distribution of hot water or other inflation medium cannot be achieved
,0 through their internal spaces during the curing process. The result is that some parts of the new lining remain uncured at the end of the normal process time. A further shortcoming of known systems is that the inflatable forms employed completely fill a pipeline or sewer pipe during the
35 relining process, interrupting all flow. Bypassing of the section being refurbished is thus often a necessity. Inflatable forms which embody a coaxial duct capable of sustaining a flow through a section of pipeline or sewer pipe whilst it is being refurbished are known in the art.
However, rigid coaxial ducts are employed making the forms likewise rigid and thus difficult to insert into a pipeline or sewer pipe section from the usual access means.
The present invention aims at providing an apparatus for the refurbishment of pipelines and sewer pipes through the application of a layer of thermosetting resin-impregnated reinforcement material to their inner walls by means of an inflatable form which may be readily and reliably stripped from a refurbished section and which embodies a coaxial duct capable of sustaining a flow of water or sullage through the form whilst it is in use.
Preferably the invention also may be rendered flexible or more or less rigid as circumstances dictate.
According to a first aspect of the present invention there is provided apparatus for applying in situ a repair material to a repair zone of an inner wall of a conduit, sa,id apparatus comprising a core member, a radially expandable device located outwardly of said core member extending axially along said core member and at least partially circumferentially around said core member, said radially expandable device having an outer surface portion connected to said core member only at or adjacent one axial end of said outer surface portion of the radially expandable device. Conveniently, the radially expandable device comprises an inflatable element defining an annular or part annular encl.osed space extending axially along said core member. Preferably the inflatable element comprises inner and outer flexible sheets connected to said core member at adjacent axial positions with the annular or part annular enclosed space being located between said inner and outer flexible sheets. In a still further preferred embodiment a flexible shroud member is arranged over and outwardly of said inflatable element, said flexible shroud member forming said outer surface portion. The arrangement of the inflatable element, preferably a tube, thus defined enables the tube, upon deflation, to be peeled away from the repair material by at least partial eversion when the form member is axially withdrawn along the pipeline without affecting the seal between the reinforcing material and the pipeline wall.
Conveniently the annular space is divided to form a fluid flow passage circulating at least in part along the outer surface of the tube. Preferably the annular enclosed space is divided by an annular or part annular wall member secured at one end to the form member at a position between opposed ends of the flexible tube. Inflating medium inlet and outlet means may be provided on either side of the dividing annular or part annular wall means. In a particularly preferred arrangement the core member is annular in construction enabling the maintenance of fluid flow through the pipeline during the repair process.
According to a second aspect of the present invention there is provided apparatus for use in the repair of pipelines by the application of reinforcement material impregnated with a settable resin to an inner wall of the pipeline, said apparatus including a core member and an inflatable member secured to an outer surface of the core member, said core member being formed by a plurality of annular sections, each said annular section having end formations adapted to engage with end formations of an adjacent said section when axially pressed together to maintain a rigid annular shape for said core member, and means to selectably press said end formations into engagement or release said end formations from engagement. Conveniently when the end formations are released, the core member can be flexed to allow passage through curved pipe lengths.
According to a still further aspect, a method of repairing pipelines is provided according to the present invention, said method comprising providing a core member with a radially expandable device located outwardly of said core member, said radially expandable device extending axially along said core member and at least partly circumferentially around said core member, said radially expandable device having an outer surface portion connected to said core member only at or adjacent one axial end of said outer surface portion of the radially expandable device, locating a repair material over said outer surface portion of the radially expandable device, positioning the c core member together with said repair material into the conduit to be repaired so that said repair material overlies a zone of said conduit to be repaired, expanding said radially expandable device so as to press the repair material including a settable substance against the zone of ,Q the conduit to be repaired, holding the expanded condition of said radially expandable device for a length of time sufficient for said repair material to remain adhered to said conduit to be repaired, and contracting said radially expandable device and withdrawing said core member from said ■15 conduit in a manner whereby the outer surface portion of the radially expandable member is peeled from said repair material by at least partial eversion. Conveniently the core member is withdrawn from said conduit by moving the core member along the conduit in a direction towards an Q axial end of said outer surface portion opposite to said one end connected to the core member.
Various preferred aspects of the present invention will be more readily understood by reference to the following description of preferred embodiments given in c relation to the accompanying drawings in which:
Figure 1 is a longitudinal cross sectional view of one side of an inflatable form.
Figure 2 is a longitudinal cross sectional view of part of the coaxial duct of a form. Q With reference to Figure 1, an inflatable form 1 is made by partially everting a tube of a suitably elastic material and fastening its two ends 2 and 3 adjacent each other to a core member in the form of a coaxial duct 4, end 3 being positioned adjacent one end of said coaxial duct. c Fixed to said coaxial duct between said ends is one end 5 of a tubular director sleeve 6 which extends axially substantially throughout the length of said inflatable form and its other end being open. Said director sleeve may be made of impervious material or may be made wholly or partly foraminous. Inlet and outlet means 8,11 are provided on either side of the sleeve 6 to enable an inflating medium to be delivered and withdrawn from the form 1. Fastened c coaxially to end 3 of said tube or to a point on said coaxial duct beyond the position of end 3 if the end of said coaxial duct is extended is one end of a flexible outer shroud 7, the other end of which is free against the other end of said coaxial duct. It will of course be appreciated
1Q that the outer shroud 7 might be omitted from the embodiment illustrated and in which case the outer flexible wall 20 of the tube 1 forms the outer surface portion of the inflatable element. It is also possible when using an outer shroud 7, a simple inflatable element might be used with its axial
•jc ends connected to the duct 4 at spaced ends thereof. In operation, a tube of thermosetting resin-impregnated reinforcement material is placed over said inflatable form and the whole assembly is introduced into the section of a pipeline or sewer pipe required to be refurbished with end 3
2Q of said tube foremost. Correct positioning may be verified through the use of closed circuit television. An inflatation medium at a suitable temperature and pressure is then introduced through duct 8, causing said form to expand and force said resin-impregnated reinforcement material into 5 intimate contact with the inner wall surfaces of the pipeline or sewer pipe. The flow of the inflating medium passes through the annular spaces 9 and 10 between said tubular director sleeve and the opposing inner surfaces of said form to exit through duct 11, said circulation ensuring 0 an even temperature distribution. The inflating medium circulates at a suitable pressure and temperature is preferably continued until full curing of the resin of said resin-impregnated reinforcement material is obtained. Temperature distribution may be adjusted as required by the 5 provision of a said tubular director sleeve provided with foramina of a number size and positioning to allow a suitable short-circuiting of the heated flow. Conveniently, the inflating medium might be water, air or some other suitable gas or fluid. Following full curing of the thermosetting resin with which said reinforcement material is impregnated, water circulation is stopped and all water is drained or pumped from the internal spaces of said form. Said form is then π slowly withdrawn from the pipeline or sewer pipe section with end 3 of said tube rearmost. This action causes said flexible outer shroud to evert and peel cleanly from said reinforcement material so that, as the form exits the section which has been refurbished, it is more or less ιn totally everted. Said peeling action has been shown to be extremely efficient at overcoming any residual adhesion between said flexible outer skin and the resin in which said reinforcement material is impregnated.
With reference to Figure 2, coaxial duct 4 of an ις inflatable form comprises a plurality of tubular elements 12 in a collinear arrangement. Each of said tubular elements is provided on one end face with a shaped, circumferential, axially extending ridge 16 and, at the other end, a complementary_recess 17. When the ends of adjacent said
20 tubular elements are abutted, said ridges and recesses register to locate said tubular elements in collinearity. Provided through the length of each of said tubular elements is one or more cable ports 13 through which a tensioning cable 14 passes from one end of said coaxial duct to the
25 other. Said tensioning cable is fixed to the terminal member at one end of said coaxial duct and is provided at the other end with screw or other suitable means by which said tensioning cable may be tensioned. When said tensioning cable is tensioned, said tubular elements are
30 held in rigid alignment with their adjacent said complementary circumferential ridges and recesses registering in a way which ensures their collinearity. Extending throughout the length of said coaxial duct is outer jacket 15 of some suitably flexible material which is ,c fastened and conveniently sealed at each end to a respective element 12. The jacket 12 serves to seal said tubular elements together. It will of course be appreciated that the jacket 15 is necessary when a simple inflatable member is used so that the inflating medium does not escape inwardly of the elements 12. With the inflatable element as shown in Figure 1, the jacket 15 might be omitted.
In operation, prior to the positioning of an inflatable form and resin-impregnated reinforcement material in a pipeline or sewer pipe, said tensioning cable or cables are loosened allowing individual members of said tubular elements to move relative to one another, thus rendering both said coaxial duct and said inflatable form flexible. With said inflatable form and reinforcement material in position in said pipeline or sewer pipe, said tensioning cable or cables are tensioned, rendering said coaxial duct and said inflatable form rigid in the manner aforesaid.

Claims

THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS:
1. A method of repairing a conduit comprising providing a core member with a radially expandable device located outwardly of said core member, said radially expandable device extending axially along said core member and at least partly circumferentially around said core member, said, radially expandable device having an outer surface portion connected to said core member only at or adjacent one axial end of said outer surface portion of the radially expandable device, locating a repair material over said outer surface portion of the radially expandable device, positioning the core member together with said repair material into the conduit to be repaired so that said repair material overlies a zone of said conduit to be repaired, expanding said radially expandable device so as to press the repair material including a settable substance against the zone of the conduit to be repaired, holding the expanded condition of said radially expandable device for a length of time sufficient for said repair material to remain adhered to said conduit to be repaired, and contracting said radially expandable device and withdrawing said core member from said conduit in a manner whereby the outer surface portion of the radially expandable member is peeled from said repair material by at least partial eversion.
2. A method according to Claim 1, wherein said core member is withdrawn from said conduit by moving the core member along the conduit in a direction towards an axial end of said outer surface portion opposite to said one end connected to the core member.
3. A method according to Claim 1 or Claim 2, wherein said radially expandable member comprises an inflatable element defining an annular or part annular enclosed space extending axially along said core member. 4. A method according to Claim 3, wherein said inflatable element comprises inner and outer flexible sheets connected to said core member at adjacent axial positions with the annular or part annular enclosed space being located between said inner and outer flexible sheets, said outer sheet forming said outer surface portion.
5. A method according to Claim 3, wherein said inflatable element comprises inner and outer flexible sheets connected to said core member at adjacent axial positions with the annular or part annular enclosed space being located between said inner and outer flexible sheets, said outer surface portion being formed by a flexible shroud member positioned outwardly of said sheets forming the enclosed space, said flexible shroud member being secured to said core member or said outer flexible sheet only at or axially outwardly of the connection of said outer flexible sheet to said core member.
6. A method according to Claim 3, wherein a flexible shroud member is secured at only one axial end to the core member or the inflatable element at or axially outwardly of one axial end of the inflatable element.
7. A method according to any one of Claims 3 to 6, wherein fluid is directed into said enclosed space to radially expand said inflatable element.
8. Apparatus for applying in situ a repair material to a repair zone of an inner wall of a conduit, said apparatus comprising a core member, a radially expandable device located outwardly of said core member extending axially along said core member and at least partially circumferentially around said core member, said radially expandable device having an outer surface portion connected to said core member only at or adjacent one axial end of said outer surface portion of the radially expandable device. 9. Apparatus according to Claim 8, wherein said radially expandable device comprises an inflatable element defining an annular or part annular enclosed space extending axially along said core member.
10. Apparatus according to Claim 9, wherein said inflatable element comprises inner and outer flexible sheets connected to said core member at adjacent axial positions with the annular or part annular enclosed space being located between said inner and outer flexible sheets.
11. Apparatus according to Claim 10, wherein a divider partition is connected to said core member between said adjacent axial positions, said divider partition dividing said enclosed space into axial extending flow passages, fluid connection means to said enclosed space being located between said adjacent axial positions on either side of the divider partition.
12. Apparatus according to any one of Claims 9 to 11, wherein a flexible shroud member is arranged over and outwardly of said inflatable element, said flexible shroud member forming said outer surface portion.
13. Apparatus according to any one of Claims 8 to 12, wherein said core member defines an axially extending passage so as to permit flow through said conduit while said apparatus is in use.
14. Apparatus according to Claim 13, wherein the core member is constructed of a plurality of annular sections, each said annular section having end formations adapted to engage with end formations of an adjacent said section when axially pressed together to maintain a rigid annular shape for said core member, and means to selectably press said end formations into engagement or release said end formations from engagement. - ll - lδ. Apparatus for use in in situ repair of pipelines by the application of repair material impregnated with a settable substance to an inner wall of the pipeline, said apparatus including a core member and an inflatable member secured to an outer surface of the core member, said core member being formed by a plurality of annular sections, each said annular section having end formations adapted to engage with end formations of an adjacent said section when axially pressed together to maintain a rigid annular shape for said core member, and means to selectably press said end formations into engagement or release said end formations from engagement.
EP90906072A 1989-04-07 1990-04-09 Method of repairing a pipeline and apparatus for use in such a method Expired - Lifetime EP0420959B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90906072T ATE94966T1 (en) 1989-04-07 1990-04-09 METHOD OF REPAIRING A LINE AND DEVICE FOR USE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU3570/89 1989-04-07
AUPJ357089 1989-04-07

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP93200459.1 Division-Into 1993-02-18

Publications (3)

Publication Number Publication Date
EP0420959A1 EP0420959A1 (en) 1991-04-10
EP0420959A4 true EP0420959A4 (en) 1991-10-16
EP0420959B1 EP0420959B1 (en) 1993-09-22

Family

ID=3773833

Family Applications (2)

Application Number Title Priority Date Filing Date
EP19930200459 Withdrawn EP0550417A3 (en) 1989-04-07 1990-04-09 Method for repairing a pipeline and apparatus for use in such a method
EP90906072A Expired - Lifetime EP0420959B1 (en) 1989-04-07 1990-04-09 Method of repairing a pipeline and apparatus for use in such a method

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP19930200459 Withdrawn EP0550417A3 (en) 1989-04-07 1990-04-09 Method for repairing a pipeline and apparatus for use in such a method

Country Status (13)

Country Link
US (1) US5203377A (en)
EP (2) EP0550417A3 (en)
JP (2) JP2544839B2 (en)
KR (1) KR920700377A (en)
AT (1) ATE94966T1 (en)
AU (1) AU645011B2 (en)
BR (1) BR9006407A (en)
CA (1) CA2030791A1 (en)
DE (1) DE69003500T2 (en)
DK (1) DK0420959T3 (en)
ES (1) ES2045913T3 (en)
RU (1) RU1835025C (en)
WO (1) WO1990012243A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108361468A (en) * 2018-03-03 2018-08-03 陈晓辉 A kind of central air-conditioning pipeline repair apparatus

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9203005D0 (en) * 1992-02-13 1992-03-25 Insituform Group Ltd Improvements relating to the lining of pipelines or passageways
WO1993019321A1 (en) * 1992-03-20 1993-09-30 Barry Bros, Specialised Services Pty. Ltd. Apparatus for use in repairing a pipeline and method for carrying out such repairs
WO1993019322A1 (en) * 1992-03-24 1993-09-30 Barry Bros. Specialised Services Pty. Ltd. Pipeline repair apparatus including expandable forms
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CN108361468B (en) * 2018-03-03 2019-09-13 河北纳森空调有限公司 A kind of central air-conditioning pipeline repair apparatus

Also Published As

Publication number Publication date
ES2045913T3 (en) 1994-01-16
WO1990012243A1 (en) 1990-10-18
DK0420959T3 (en) 1993-11-01
DE69003500D1 (en) 1993-10-28
ATE94966T1 (en) 1993-10-15
CA2030791A1 (en) 1990-10-08
BR9006407A (en) 1991-08-06
RU1835025C (en) 1993-08-15
JP2534030B2 (en) 1996-09-11
EP0420959B1 (en) 1993-09-22
JP2544839B2 (en) 1996-10-16
US5203377A (en) 1993-04-20
EP0420959A1 (en) 1991-04-10
AU5447190A (en) 1990-11-05
EP0550417A2 (en) 1993-07-07
AU645011B2 (en) 1994-01-06
DE69003500T2 (en) 1994-01-13
JPH03506065A (en) 1991-12-26
JPH07151293A (en) 1995-06-13
EP0550417A3 (en) 1993-08-11
KR920700377A (en) 1992-02-19

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